20700153 has 6 divisors (see below), whose sum is σ = 29900234. Its totient is φ = 13800096.

The previous prime is 20700143. The next prime is 20700181. The reversal of 20700153 is 35100702.

It can be written as a sum of positive squares in only one way, i.e., 20142144 + 558009 = 4488^2 + 747^2 .

It is not a de Polignac number, because 20700153 - 2¹² = 20696057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20700103) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1150000 + ... + 1150017.

Almost surely, 2^20700153 is an apocalyptic number.

It is an amenable number.

20700153 is a deficient number, since it is larger than the sum of its proper divisors (9200081).

20700153 is a wasteful number, since it uses less digits than its factorization.

20700153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2300023 (or 2300020 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 18.

The square root of 20700153 is about 4549.7420806019. The cubic root of 20700153 is about 274.5730145086.

Adding to 20700153 its reverse (35100702), we get a palindrome (55800855).

The spelling of 20700153 in words is "twenty million, seven hundred thousand, one hundred fifty-three".